Mustard Sauce - cooking recipe

Ingredients

1/2 c. butter
1/2 c. vinegar
1/2 c. sugar
1/2 c. tomato soup (condensed)
1/2 c. prepared mustard
3 egg yolks

Preparation

Beat egg yolks slightly.
Mix in double boiler with other ingredients and cook until thick.
Two whole eggs may be substituted for the 3 yolks but the sauce will have to be strained to clear it of the cooked whites.
Serve with baked ham.